XML-security is a component library implementing XML signature and encryption standards, supplied by the XML subproject of the open source Apache project. It is available at http://xml.apache.org/security. It currently provides a mature implementation of Digital Signatures for XML, with implementation of encryption standards in progress.
We obtained several sequential, previously-released versions of XML-security, each provided with a developer supplied JUnit test suite. In each version, faults were seeded using the fault seeding procedure described in the Java Fault Seeding Process.（XML-Security包中包含4个原始版本V0-V3，并且针对V1-V3都有错误植入版本）